Please enable JavaScript.
Coggle requires JavaScript to display documents.
URINE OSMOLALITY VS URINE SPECIFIC GRAVITY - Coggle Diagram
URINE OSMOLALITY VS URINE SPECIFIC GRAVITY
Abnormal findings in routine urinalysis may be the first indication of a disorder involving the kidneys and urinary tract, even in asymptomatic patients
URINALYISIS
PROTEIN
GLUCOSE
SPECIFIC GRAVITY
RED BLOOD CELLS (RBCs)
URINEACIDITY (Ph)
WHITE BLOOD CELLS (WBCs)
BILIRUBIN
Urinalysis can also be used to monitor the progression of kidney disease.
High urine osmolality
Hypovolemic state
Dehydration
Damage to renal tubular cells
Causes reduced renal blood flow
Impairs the urine-concentrating ability of the kidney
The osmolality of urine, which indicates the quantity of osmotically active particles, can be estimated by the Specific Gravity.
While the Specific Gravity correlates with urine osmolality, the direct measurement of urine osmolality is more accurate and is considered the gold standard for determining the hydration status of the body and its ability to concentrate urine.
Low urine osmolality may occur with:
Increased water intake
Vasopressin deficiency
Diabetes Mellitus
Osmolality
Normal range: 500-800 mOsmol/kg
Osmolality measurement indicates the kidney's ability in concentration and dilution
Considered more reliable than measuring the specific gravity
Requires and early morning urine sample
URINE SPECIFIC GRAVITY
NORMAL: 1.010- 1.025
Decreased Urine Specific Gravity
Excessive fluid intake
Diabetes Insipidus
Renal Failure - loss of ability to reabsorb water
Pyelonephritis
Increased Urine Specific Gravity
Dehydration: water restriction
Diarrhea: Vomiting: Excessive sweating
Glucosinuria
Heart failure - related to decreased blood flow to the kidney
Renal Arterial Stenosis
Syndrome of inappropriate antidiuretic hormone secretion